KnowledgeBoat Logo
|

Chemistry

A chemical reaction is often accompanied by external indications or characteristics.
Give two examples where a chemical reaction is accompanied by a change in colour of the reactants & products on completion of the reaction.

Chemical Reaction

166 Likes

Answer

The two examples are —

  1. Heat on Copper [II] Nitrate:
    2Cu(NO3)2 →Δ\xrightarrow{\enspace\Delta\enspace} 2CuO + 4NO2 + O2
    Blue copper [II] nitrate changes to black coloured copper [II] oxide.
  2. Heat on Lead [II] Nitrate:
    2Pb(NO3)2 →Δ\xrightarrow{\enspace\Delta\enspace} 2PbO + 4NO2 + O2
    White lead [II] nitrate changes to yellow litharge.

Answered By

103 Likes

Related Questions